Island



UNiTED sTATEs PATENT oEEIoE.

BENJAMIN ARNOLD, OF EAST GREENWIGH, RHODE ISLAND.

FILTER.

Specification of Letters Patent No. 32,815, dated July 16, 1861.

T o all whom 'it 'may concern:

Be it known that I, BENJAMIN ARNOLD, of East Greenwich, in the county of Kent, in the State of Rhode Island, have invented a new and useful Improvement in Filters; and I do hereby declare that the following is a full and correct description thereof, reference being had to the accompanying drawings and to letters of reference marked thereon.

In the drawings similar letters refer to like parts.

The construction of my filter I will proceed to describe.

A, is a hollow spheroidal shaped elastic bulb or case.

a, Z), are valves, one of which, a, is made to open toward the bulb B, while the other, opens from it.

B, is a tube attached to the upper end of the bulb A.

C is the filter which intersects the tube B, or, as in Figure 2, is put inside of it which may be done by using an elastic tube which can be stretched so as to receive the filtering medium. The tube B is furnished at each end with a hollow screw c, that it may be attached to the bulb by either of its ends, so that the direction of the current through the filter C, may be reversed for the purpose of freeing it from the dirt, that may be collected from the fluid filtered.

D is a tube extending from the lower end of the bulb A, for the purpose of conducting the fluid to be filtered to the bulb. The filter C may be placed in this latter' tube (D), instead of B, if preferred, but it makes the action of the apparatus less certain and slower to depend upon the suction of the bulb, as we should in that case, to get the 'ferr-ed.

The mode of operation is as follows: The end of tube D being inserted into the fluid to be filtered, the bulb A is compressed by the hand and the air in it forced out through the tube B as the valve ZJ, which opens inward cuts off the passage through D. By allowing the bulb A to expand again the fluid is drawn up to fill the partial vacuum in the bulb, through the tube D, as the passage through B is closed by valve a, which opens outward. By again compressing the bulb the fluid in it is forced out through the tube B, and filter O valve o closing the tube D as before.

The shape of the elastic bulb or case A, may be varied as preferred without making a material alteration in the arrangement, and the substance of the medium of the filter O may also be varied.

I-Iaving thus described my improved filter what I claim as my invention and desire to secure by Letters Patent is- The arrangement of the elastic bulb A, with the valves a, b, filter O, and tubes B, D, substantially as described, and for the purpose herein set forth.

BENJAMIN ARNOLD.

l/Vitnesses:

MARY ARNOLD, E. Gr. ARNOLD. 

